The UAC was turned off from the previous installation. I did verify that it was off and followed your instructions. I am still dead in the water. After about 10 minutes of idle time I opened the task manager to see that TC was not responding. I did also load up TrueView and can see that the files open correctly.

Right click the turbocad icon on your desktop and choose run as administrator. When the open dialog comes up hit cancel. When turbocad comes up choose open from the file menu. Open the offending DWG. Let me know if the results are any different than before.

Thanks so much for the help. I did come up with a solution. The infracting .dwg is located on our local server. The same server all of my drawing files are on. I copied the .dwg to my machine and it opened up like a champ. I'm not sure what the difference is, but it seems to be working. I will look into the other solutions you posted and get back with the out come.

An invalid XData handle (3BFE30) was found. Validation: Invalid. Replaced by Set to Null.AcDbPoint(3BFEFF). An invalid XData handle (3BFE2F) was found. Validation: Invalid. Replaced by Set to Null.AcDbPoint(3BFEFF). An invalid XData handle (3BFE2E) was found. Validation: Invalid. Replaced by Set to Null.AcDbPoint(3BFEFF). An invalid XData handle (3BFE2D) was found. Validation: Invalid. Replaced by Set to Null.AcDbPoint(3BFF00). An invalid XData handle (3BFE07) was found. Validation: Invalid. Replaced by Set to Null.AcDbPoint(3BFF00). An invalid XData handle (3BFE06) was found. Validation: Invalid. Replaced by Set to Null.

The failure reports do not show the same errors, but tc 15.2 opens the file.